Great Lakes water
The Great Lakes Water Authority treats water drawn from the Detroit River and from Lake Huron and supplies Detroit and much of southeast Michigan, with the Detroit Water and Sewerage Department handling distribution in the city. The water is moderately hard, enough to form some sediment in a tank over several years and to scale tankless units if they are never descaled.
The more important number for water heaters is temperature. In January and February, Great Lakes water reaches homes in the mid to upper 30s. A heater has to lift that water more than 80 degrees to deliver 120°F at the tap, so tanks recover slowly and run short sooner. Older 40-gallon tanks in busy households feel it first.
Detroit has also been replacing lead service lines across the city. After work on your service line or water main, a flush of the water heater helps clear any scale or debris that was knocked loose.
Bungalows, flats and basements
Detroit's housing is dominated by brick bungalows and two-family flats built from the 1910s through the 1950s, in neighborhoods such as Bagley, Grandmont-Rosedale, East English Village, Warrendale and Jefferson-Chalmers. Almost all have basements, and the water heater sits there beside the furnace, venting into a masonry chimney. Two-family flats often have a heater for each unit.
Larger historic homes in Boston-Edison, Indian Village and Palmer Woods have big basements, long pipe runs and sometimes boilers with indirect tanks. Downtown and Midtown lofts and condos rely on building systems or compact heaters in closets.
Basement flooding
Heavy summer storms in 2014, 2021 and other years overwhelmed Detroit's combined sewers and flooded thousands of basements with storm and sewer water. Water heaters standing in that water had their burners and gas controls submerged, and those heaters generally had to be replaced for safety. Contaminated floodwater also means a thorough cleanup before any appliance work.
If your basement has flooded before, raising the heater on a stand gives some margin, and a backwater valve on the sewer line, installed by a plumber, can keep sewer water from backing up through floor drains. After any flood, do not relight a gas heater until it has been inspected.
The problems plumbers see most in Detroit
- Winter short supply from 30-something-degree water and small tanks.
- Chimney venting problems after furnace upgrades leave the heater alone in an old flue.
- Flood-damaged heaters after heavy storms and sewer backups.
- Pilots that will not stay lit on decades-old basement tanks with worn thermocouples and tired gas valves.
- Corroded fittings and gas connectors in damp basements.
- Frozen and burst lines near heaters in poorly heated basements.
Typical water heater prices in Detroit
| Job | Typical Detroit range | Notes |
|---|---|---|
| Thermocouple or pilot repair | $150–$300 | |
| Gas control valve | $350–$600 | |
| Flush and sediment clean-out | $100–$250 | |
| Chimney liner or vent work | $250–$900 | Depends on the chimney |
| 40–50 gallon gas tank replacement | $1,300–$2,900 | Permit usually included |
| Tankless installation | $3,000–$5,800 | Sized for winter water |
Detroit prices are below the national average for most water heater work. Old basements, chimney relining and flood cleanup add to the cost.
Permits and licensing in Detroit
Michigan licenses plumbers through the Department of Licensing and Regulatory Affairs, which keeps an online license lookup. In Detroit, permits are issued by the Buildings, Safety Engineering and Environmental Department, and water heater replacement requires a plumbing permit, plus a mechanical or gas permit where applicable. Suburban cities such as Dearborn, Livonia and Warren run their own building departments.
Ask for the plumber's Michigan license number and whether the city permit is part of the quote.
Venting in old Detroit basements
Many Detroit homes once vented both the furnace and water heater into the same brick chimney. When the furnace is replaced with a high-efficiency model that vents out the side, the water heater is left alone in a flue built for more heat than it now carries. In Detroit's cold winters, that oversized, cold chimney may not draw, and exhaust can spill back into the basement.
A properly sized liner or a power-vent water heater fixes it. Any gas water heater service in an older Detroit home should include a draft test, and Michigan homes with gas appliances should have working carbon monoxide alarms near sleeping areas.
Repair or replace in Detroit
On a Detroit tank younger than about nine years, a thermocouple, thermostat or relief valve is almost always worth fixing. Past ten years, or after a flood, replacement is usually the better spend. When replacing, many Detroit households benefit from sizing up because of the cold winter water: a 50-gallon tank instead of a 40, a high-recovery model, or a tankless unit sized for January. DTE Energy has offered efficiency rebates on water heaters at times.
Getting ready for a Detroit winter
Detroit heaters work hardest from December through March. Before the cold arrives, flush a few gallons from the tank, look at the burner flame through the sight window (it should be mostly blue), and make sure nothing is stored against the heater or blocking its air supply. Insulate exposed hot and cold pipes near the tank, especially along exterior basement walls, and close any basement windows that let in drafts.
If you leave home for a winter trip, set a gas heater to VACATION rather than turning it off, so the tank and the pipes around it stay warm. And if a deep cold snap is forecast, know where your main water shutoff is in case a basement line freezes and splits.
Around Detroit
Dearborn, Livonia and Westland to the west have large stocks of post-war brick homes with basement heaters. Warren and Sterling Heights to the north mix 1950s and 1960s ranches with newer construction. Grosse Pointe to the east has larger historic homes. Most of the region shares GLWA water, though some communities pump from other sources.
Water heater questions from Detroit
Is Detroit water hard?
It is moderately hard, about 6 to 8 grains per gallon. Sediment builds slowly; cold winter water is the bigger challenge.
Can I use my water heater after my basement flooded?
Not until a plumber inspects it. Gas heaters with submerged controls or burners are generally replaced.
Who issues water heater permits in Detroit?
Detroit's Buildings, Safety Engineering and Environmental Department issues the permits.
Why does my hot water run out in winter?
Incoming water drops into the 30s, so the heater has to work much harder. Older or smaller tanks show it first.
How can I protect my water heater from basement flooding?
Raise it on a stand and ask a plumber about a backwater valve on the sewer line.
How often should I flush my water heater in Detroit?
Every year or two on GLWA water, and after any service line work.
Should I upgrade my water heater size in Detroit?
If you run short of hot water every winter, yes. A 50-gallon or high-recovery tank, or a tankless unit sized for 35°F incoming water, usually solves it.